tamped backfill回填土夯实;夯实回填土;夯坚同土;夯实回填
backfill compactor管沟回填土压实机;回填土压实机
water backfill水封
carbonaceous backfill用碳质物回填
backfill consolidation复土压实;回填夯实
backfill compaction回填土压实
concrete backfill混凝土回填
cohesive backfill粘性填土
helium backfill回充氦气;再充氦
V（动词） to refill an excavated trench, esp (in archaeology) at the end of an investigation (尤指考古挖掘后)重新填埋坑、壕
N（名词） the soil used to do this 回填土